Glass feeder shear mechanism having overlap adjusting and throwout means



K. SHEAR lJune l5, 1954 E. PEILER 2,680,937 GLAss FEEDER MECEANISM HAVING ovEELAP ouT MEANS l ADJUSTING AND THROW Original Filed April 21, 1949 2 Sheets-Sheet l June 15, 1954 K. Ehem-.ER l GLASS FEEDER SHEAR MCHANISM HAVING Y AnJusT-NG AND THRowoUT MEANS f original Filedmpral 2.1. 1949 2,680,937 ovERLAP LATCHED OUT POSITION I Arcl-HNG POSITION 'IN'VENTR KARL E. PEILER ATTORNEYS l22 Sheets-Sheet 2 Patented June 15, 1954 UNITED STA'RES T OFFICE GLASS FEEDER SHEAR MECHANISM HAV- ING yOVERLIP ADJUSTING AND THROW- ()UT MEANS Karl E. Peilcr, West Hartford, Conn., assigner to Emhart Manufacturing Company,

tion of Delaware Claims.

This application is a division of my co-pending application, Serial No. 88,869, filed April 21, 1949, now Patent No. 2,654,184, for an improvement in glass feeding apparatus, and is :tiled for the purpose of claiming the invention thereof that is embodied in a shear mechanism having improved means for adjusting the overlap of the shear blades when closed and improved means for latching the shear blades out oi operation when in their open or retracted positions when desired and for restoring them to operation in their former timed relation to other operating parts of the feedingl apparatus.

A practical embodiment of the invention is shown in the accompanying drawings, showing the structures of Figs. 18, 24, 25, 26 and 27, respectively, of the parent application, Serial No. 88,869, now Patent No. 2,654,184 and is described in detail in the following specification, which consists of the pertinent portions of the specilication of the parent case.

In the accompanying drawings:

Fig. l is a plan View of the shears;

Fig. 2 is a view showing the shear cam, a shear cam lever associated therewith and a shear throw-out mechanism operatively applied thereto, such throw-out mechanism being shown in position to hold the cam roller carried by the lever latched out of position for contact with the cam;

Fig. 3 is a detail of the shear cam lever throwout mechanism in position to throw the lever out of operating position;

Fig. fi is a view like Fig. 3 but showing the throw-out mechanism inactive during operation of the shear cam lever; and

Fig. 5 is a fragmentary sectional view, showing the reverse side of the shear throw-out mechanism from that shown in Figs. 2 to Il.

The shear mechanism comprises a right hand, horizontally disposed shear arm 298 and a cooperative left hand shear arm 299, as viewed in Fig. l. The shear arms 288 and 293 are pivotally mounted on vertical shear posts or spindles 382 and 363, respectively. When swinging movement is imparted to one of the shear arms the other will be correspondingly moved but in the opposite direction by reason of the action of zo-engaging gears 369.

The shear arms 298 and 298 are provided with open ended, longitudinal ways 33'! and 338, respectively, in which end portions of the outer end sections or extensions 3-39 and 348, respectively, of such arms slidably lit. Fastening devices 313i secure the end sections to their shear arms in ad- .'ustedy positions. These end sections 389, 36E) carry the cooperative upper and lower shear blades, respectively. In the feeder construction as particularly described so far, the orifice ring is provided with two oriiices for feeding a pair of glass charges simultaneously and the shearing mechanism has two pairs of cooperative upper and lower blades for shearing the charges proT duced. The upper shear blades are indicated at 3552 and 843, respectively, and their cooperative lower shear blades 8% and SL15, respectively. The blades 36:2 and, 3dS are mounted by holders 346 and Si? on the right hand. shear arm end section 339, both these holders being constructed and arranged in a known manner to permit individual tilting of these blades about their longitudinal medial lines. Of the lower shear blades, the front shear blads 345 which cooperates with the front upper shear blade 663, these being the shear blades nearest the hubs of the shear arms, is mounted by a holder 848 in a fixed position on the end section Sliil of the left hand shear arm. The rear lower blade, 354, is mounted by a holder 369 which preferably is constructed and arranged to permit individual vertical adjustment thereof so that its tension on the cooperative rear upper blade may be preset to correspond exactly to the tension between the front blades.

The longitudinal adjustments of the end sections 338 and 36S in their shear arms provide adjustment of the points of cutting of the shear blades when they are closed as indicated by the dot-and-dashlines in Fig. l, these being predetermined to coincide with the axial lines of the respective orifices in the bottom of the feeder orifice ring. Also, this adjustment permits selective uses of the same shear mechanism with single and double orice feeders. Thus, either the front or rear pair of shear blades could be positioned for use to sever glass which is provided in suspension from a single feed orice.

The closing and opening movements of the shear arms are effected by suitable motion transmitting mechanism actuated by a shear cam 362 on the cam shaft 255. The shear cam acts on a cam roller 363 carried by an intermediate portion of a shear cam roller lever 364 which is pivotally supported at its upper end on a horizontal xed position shaft 365. The lower end of the lever 36d is provided with an opening S66 therethrough, this opening extending in a direction normal to the direction of the axis of the pivot shaft 865- and serving as a slideway for a block 361, as best seen in Fig. 2. The block 86? is permitted only limited movement longitudiopening 396, such movement being limited by a pin 339 projecting from the wall of the opening 399 into a longitudinal slot 339 in the block 33?. The block is connected by a universal joint 319 to a connecting rod 37| which is connected. by a universal joint 312, Fig. 1, to the right hand shear arm 298. The position of the block 33T in the slide opening 39S is controlled by an adjustingscrew 313 journalled at 311i in a cap ST5 which closes the outer end of the opening 339, Fig. 2. This adjusting screw 3T3 is screwed into a threaded opening 379 in the block 36'?. A bevel gear 3T! nxed on the adjusting screw 3l3 is in mesh with a bevel gear 3i@ operable by a rod 319 which extends to a convenient place for manipulation by an operator of a feeder and is there provided with an operating handle 339. As shown, the operating handle 399 is on a short lug 334e on the shear lever adjacent to the axis of oscillation of such lever and is yieldingly held against unintended turningI by a conventional spring-loaded latch 39Go. By turning the rod 379, the connecting rod 37| may be moved rectilinearly to adjust the overlap of the shears when theyare at the ing strokes. This adjustment may be effected during operation and while the shears are closed and opened in rapid succession.

Preferably, an air spring mechanism 38|, as shown in Fig. l, is employed to cooperate with the cam 392 in controlling the opening and closing movements of the shear blades. This air spring mechanism comprises a cylinder 392 supported at one end by a universal joint arrangenally in the ment 393 upon a xed bracket 393 adjacent to the outer end of the left hand shear arm when the latter is in its open position. A piston 335 is reciprocable in the cylinder 382 and has a projecting rod 399 which is connected by a universal joint arrangement 381 with an outturned knuckle 398 on the left hand shear arm 399 at about the same distance from the hub of the latter as the connection between the connecting rod 3'|| and the right hand shear arm. Air is supplied to the last-named end of the cylinder 382 by a suitable air line connection, indicated at 389, and a dash-pot arrangement 390 is provided at the opposite end of the cylinder to dampen the movements of the piston 385 in the cylinder and hence the effect of such movements i in cooperation with the shear cam 392. Control of the application of air to the cylinder 392 through the connection 389 is by a valve 39|, Figs. 2, 3, and 4, as hereinafter explained. The

limits of their closair spring mechanism 38| does not, per se, form si;

part of the present invention, but is disclosed and claimed in the co-pending application of Charles R. Avery, Serial No. 710,967, filed November 20, 1946, entitled Glass Feeder Shear Mechanism Actuating Means and Method, on which Patent ,-4

No. 2,472,560 issued on June 7, 1949.

The shears may be thrown out of operation during continued operation of the feeder by a mechanism which is shown in detail in Figs. 2 to 5, inclusive. This mechanism comprises a hook 392 pivoted loosely on an eccentric end portion 393 of a rotary horizontal shaft 393 which is carried by a bracket arm 393 on a nxed part of the feeder framework 393. The hook 392 has an integral tail piece 39? of substantial lateral extent s parallel to the shaft 394. The shaft 399 is paral lel to the shaft 25| carrying the shear cam 392 and is located at a lower level and at the opposite side of the shear cam roller lever 353, as appears from Fig. 2. The latching hook 332 on the @CCSTI- tric end portion of the shaft 393 is turned toward the shear cam 392 adjacent to the path of swinging movement o the lever 334 in response to the rotation of the cam 33?., the bill of the hook 392 laterally overlapping one side of the lever 363 when the latter has been swung toward the shaft 393 by Contact of the roller 333 with a high part of the cam 352. A substantially vertical coil spring 493 is connected at its upper end, as at Lilli, to the bill of the latching hook 392 and at its lower end, as at 392, to an upstanding lug 333 on a stationary support 393 adjacent to the lever 399. The action of the spring G99 is to tend to pull the bill of the lever 393 down ward to position to hooi; over and engage at 2395 with a notched upper end of an upstanding latch post 39B on a horizontal pivot stud Si carried by the shear lever 333. The post 333 has a base 998 underlying the horizontal pivot element 491 and projecting laterally on opposite sides thereof. Adjustable thrust screws 399 are threaded through the oppositely extending portions of the base 398 against abutment ribs lili] on the shear lever 363 so as to maintain the latching post 493 rigid with the lever while permitting adjustments of the upper end thereof in an arc along the side of the lever toward or away fromthe axis of the shaft 399.

When the latchinghook 392 is permitted to hook over the notched upper end of the post 999, as shown in 3, the roller 333 on the lever 393 will be retained at the limit of its outward movement by the earn 392 or, in other words, in position to ride on the high portion of the cam 362. This is the latching position of the hook and the hook may be moved thereto from a relatively raised position, as shown in Fig. 4, in which the upper end of the latching post 399 is come pletely below the bill of the hook and is 'free to swing with the lever 399 under the bill of the hook toward and from the axis of the cam shaft 25|. This is the position of the latching hook when the shears are in operation and the cam roller lever 333 is swinging back and forth as the cam 392 rotates and as required for periodic cutting strokes by the shear blades. The lever 393 is withdrawn further from the cam from the Fig. 3 position by operation of the latch-out mechanis-m, as to the position shown in Fig. 2, in which the roller 333 is held away from even the highest portion of the cam. This is the latched-out position and is attained by rotary movement of the shaft 393 around its axis from the position shown in Fig. 3 to the position shown in Fig. 2, the eccentric end portion 393' of such shaft then being swung away from the cam so as to act through the latching hook on the latching post 393 and on the shear lever 353 carrying that post.

The movements of the latching hook to the several positions described are eiected by an assembly of elements in addition to the spring 999, as now described. This includes the handle 398 having a hub (not shown) on the shaft 394 and extending at the opposite side of the latter from the latching hook 392. Also rotating with the shaft 394 is a relatively short arm lil l which may be integral with a portion of the hub of handle 398 and is formed to provide a holder 4|2 having a pocket i3 in which is disposed a slidable head 3M of a thrust pin H5 which projects from the pocket M3 beyond one end of the holder 4 I2. A coil spring d 3 in the pocket acts continuously on the head 5M to tend to keep the pin H5 fully projected. The location of the arm 4H on the shaft 394 and its shape are such that the thrust pin 4|5 will contact at its outer end with the tail piece 3ST! of the latching hook 332v when the handle 398 has been swung from the relatively raised position shown in Fig. 2 to the position shown in Fig. 3 and the pin 4| 5 may be forced partly into the pocket 4|3 against the pressure of the spring 4| when the handle 39S is moved further in a downward direction from the position shown in Fig. 3 to that of Fig. 4. Movement of the arm 338 from the position shown in Fig. 2 to that shown in Figi. 3 will, of course, be attended by a like angular turning movement of the' shaft 333 about its axis and this will return the eccentric end portion 393 of that shaft from the position shown in Fig. 2 to that shown in Fig. 3, thereby allowing the lever 364 to swing from its latched-out position to the latching position at which the roller 363 carried thereby is in a position to contact with the highest portion of the periphery of the cam 362. Movement of the handle 393 from the position shown in Fig. 3 to that shown in Fig.' 4 will be attended by a forward rotary movement of the shaft 334 and swinging of the eccentric end portion 393 toward the axis of the cam 362 so as to effect raising of the bill of the latching hook 392 sufficiently to release the latch post 406 and thereby to permit the shear lever to swing free of the latching mechanism as the roller 353 rides on the periphery of the shear cam. A spring detent or dog 4 l 'l on a stationary supporting plate M8 will engage with a notch 419 in the periphery of a latching collar 42B onthe shaft 39s when the handle 393 is in the relatively raised position shown in Fig. 2. This latching collar 323 has a. second notch 32| in its periphery with which the spring dog 4H will engage when the handle is in 1the latching position shown in Fig. 3. A third notch, indicated at 422, is provided in the periphery of the latching collar i2 so as to be engaged by the dog 4|? when the handle 398 is in the shear operating position shown in Fig. 4. The collar 420 may be an integral part of the hub of the handle 393 or it might be a separate member secured to the shaft 394 in any suitable known way. The engagement of the dog with the notches of the periphery of the collar 423 is frictional so as to prevent unintended turning of the handle or of any of the parts moved therewith or actuated thereby to move from any one of the three positions described. The swinging movement of the handle about the axis of the shaft 394 in one direction may be limited by the contact of an adjustable stop 423 with a xed cooperative abutment (i213 as the handle is swung about the axis of the shaft 394. The stop 423 is shown as being mounted on a lug 425 which may be integral with the hub of handle 338. An adjustable vertical stop 426 under the latching hook 392 will limit downward swinging movement of that hook under the pull of the spring 43E] during disassambly or assembly of the parts of the mechanism, When assembled, the coaction of the operating parts of the mechanism with the latching hook will determine its angular position about the axis of the eccentric end portion 393 of the shaft 394. The adjustable stop 423 is shown as a screw threaded stud extending through a lug 427 on the supporting bracket arm 395.

The arm 398 carries a cam block 426 fixed to one side thereof in position to contact a pivoted lever G29 for depressing a stem 433 of the normally closed air valve 39! when the arm 338 is swung from the latched-out position shown in Fig. 2 to the latching position of Fig. 3. The cam block 428 will continue in contact with the lever 439 so as to maintain the valve stem 433 depressed during forward swinging movement oi' the arm 393 from the latching position of Fig. 3 to the operating position shown in Fig. 4. The valve 39! is provided with an air supply pipe 432 andvhas an outlet portion, indicated at 433, with which the air line 389 is connected. The air line connection 389 supplies air to the cylinder 382, Fig. l, such cylinder. being part of the operating mechanism of the shears as hereinbefore explained. Thus, when the shears are latched out of operation by the shear throw-out mechanism as just described, the normally vclosed valve 33! will be closed and air will be shut oir from the air operated part of the shear operating mechanism. However, when the throw-out mechanism4 is operated to permit resumption of the operation of the shears, the valve 39! will be opened simultaneously and be kept open while the shears are in operation. This arrangement not only conserves compressed air while the shears are inactive but prevents any unintended actuation of parts thereof by the pressure fluid while the shears are intended to be inactive, thus serving as a safety device to protect an operator while he is changing orifice rings or working in a position which would be dangerous if unintended activity of the shears should be resumed.

A remote control operating mechanism may be provided for turning the shaft 391i at a distance therefrom, as by an operator on the factory floor.

I. claim: l'. In a shear mechanism for glass feeding apparatus, a pair of pivoted cooperative shear arms l" carrying cooperative upper and lower shear blades and mounted to close and open said cooperative blades by swinging movements toward and away from each other, means interconnecting said shear arms to cause them to swing in unison in opposite directions when either is swung about its pivotal axis, a rotating shear cam having an open peripheral cam surface, a cam roll, a cam roll lever pivoted at one end adjacent to the cam and carrying said cam roll in position to bear against the peripheral cam surface of the cam, said lever being swingable about its pivotal axis toward and away from the axis of rotation of its cam and being provided adjacent to its opposite end with a slideway extending in a direction normal to its pivotal axis, a block mounted to slide in said slideway, a connecting rod operatively connected at one end to said block and at its opposite end to one of said shear arms, and means carried by the cam roll lever so as to be operable adjacent to the pivoted end of the lever to adjust said block longitudinally of said slideway to adjust the overlap of the cooperative blades when closed.

2. The combination defined by claim 1 wherein said means to adjust said block along said slideway comprises gearing having a driving connection with said block, an operating rod for operating said gearing, said operating rod and said gearing being mounted on said cam roll lever for movement therewith and said rod having an end portion positioned adjacent to the pivotal axis of the lever so as to minimize the speed and extent of its movements as the lever swings, and a handle on said end of the operating rod operable conveniently by hand to adjust the overlap of the shear blades during operation of the shear mechanism.

3. In a shear mechanism for glass feeding apparatus, the combination with a pair of operatively interconnected pivoted shear arms carrying cooperative shear blades, a rotating shear cam having an open peripheral surface, a cam roll, a cam roll lever pivoted at one end adjacent to the cam and carrying said cam roll in position to bear against said peripheral surface of the cam, and an operating connection between said lever and one of said shear arms, of means to latch the cam roll lever out of operation during continued rotation of the cam comprising a rotary shaft parallel to the axis of rotation of the cam and at the opposite side of the cam roll lever from the cam and adjacent thereto, said shaft having an eccentric end portion, a rigid latching projection on the cam roll lever, a latch-out hook loosely mounted on the eccentric end portion of the shaft to engage with said projection on the cam roll lever when the cam roll is on the high portion of the periphery of its -cam and the shaft has been rotated to an angularly predetermined position such as to dispose the hook in a latching position, spring means urging said hook into engagement with said latching projection, said hook being adapted to cooperate with said latching projection to pull the cam roll lever to a latched-out position clear of the periphery of the cam when the shaft is turned about its axis in one direction from its said angularly predetermined position, hook release means on said shaft turnable therewith to contact and swing the -hook clear of the latching projection against the opposition of said spring means when the shaft is turned about its axis in the opposite direction4 from its said angularly predetermined position, whereby to permit operations of the cam roll lever, and means operable at will to turn said shaft about its axis.

4. In a shear mechanism for glass feeding apparatus, the combination defined by claim 3 wherein said hook release means comprises a short projecting arm on the shaft in fixed angular relation to the eccentric end portion of the shaft, and a spring loaded thrust element carried by said projecting arm in position to contact and exert pressure against a portion of said hook When the shaft is turned about its axis to said angularly predetermined position,

5. In a shear mechanism for glass feeding apparatus, the combination defined by claim 3 and, in addition, an air cylinder having an operating connection to the second of said shear arms for cooperation with the cam actuated means to effect repeated opening and closing of the shear blades, means including a normally closed air valve located adjacent to said rotary shaft to supply operating air to the cylinder, said valve having a normally projected stem adapted when depressed to open said air valve, a pivoted lever for depressing said stem, and cam means carried by said rotary shaft in position to be moved into engagement with said lever to depress said stem and open said valve when said shaft is turned from the latched-out position of the hook to the latching position thereof and to move out of engagement with said lever to permit closing: of the valve when the shaft is turned back to'V said latched-out position, said cam means coacting with said lever to hold said valve stem depressed and the valve open during rotary movements of the shaft from said latching position to position to permit operation of the cam roll lever and back to the latching position.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Y Date 1,760,435 Peiler May 27, 193C 1,950,339 Barker, Jr. Mar. 6, 1934 2,472,560 Avery June 7, 1949 

